Competition within low-density bacterial populations as an unexpected factor regulating carbon decomposition in bulk soil

Coche, Alexandre; Babey, Tristan; Rapaport, Alain; Gonod, Laure Vieublé; Garnier, Patricia; Nunan, Naoise; Dreuzy, Jean‐Raynald de

doi:10.1016/j.soilbio.2021.108423

Cited by 5 publications

(4 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…74 In this study, we used air-dried soil as the test soil, and microbial-mediated decomposition of recalcitrant organic carbon may be stronger compared to field soil. 79 Many previous studies have suggested that abundant labile SOM input enhanced microbial cooperation, 80,81 which is inconsistent with our findings for bacteria showing that the proportion of positive correlation edges changed from 70% (ZnSO 4 treatment) to 59% (ZnO NP treatment) and 64% (s-ZnO NP treatment) (Figure 4A,B). We speculated that the enhanced bacterial competition may play a role in defending against the adverse conditions of NP exposures, 82,83 where stress-affected bacteria maximize their survivability by competing with each other.…”

Section: Analysis Of Zn Content and Soil Chemical Propertiescontrasting

confidence: 99%

“…We speculated that the enhanced bacterial competition may play a role in defending against the adverse conditions of NP exposures, , where stress-affected bacteria maximize their survivability by competing with each other . Notably, a higher average degree and more positive correlation proportion under s-ZnO NP treatments than that of ZnO NP treatment suggested closer microbial interspecies relationships and cooperation in s-ZnO NP treatments (Figure A,B), which may contribute more to SOM decomposition. , …”

Section: Resultsmentioning

confidence: 91%

“…84 Notably, a higher average degree and more positive correlation proportion under s-ZnO NP treatments than that of ZnO NP treatment suggested closer microbial interspecies relationships and cooperation in s-ZnO NP treatments (Figure 4A,B), which may contribute more to SOM decomposition. 80,81 Environmental Implications. This study investigated the effects and mechanisms of ZnO NPs and s-ZnO NPs on the release and decomposition of organic carbon in the legume rhizosphere.…”

Section: Analysis Of Zn Content and Soil Chemical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Pristine and Sulfidized Zinc Oxide Nanoparticles Promote the Release and Decomposition of Organic Carbon in the Legume Rhizosphere

Liu,

Tsyusko,

Unrine

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

The effects and mechanisms of zinc oxide nanoparticles (ZnO NPs) and their aging products, sulfidized (s-) ZnO NPs, on the carbon cycling in the legume rhizosphere are still unclear. We observed that, after 30 days of cultivation, in the rhizosphere soil of Medicago truncatula, under ZnO NP and s-ZnO NP treatments, the dissolved organic carbon (DOC) concentrations were significantly increased by 1.8-to 2.4-fold compared to Zn 2+ treatments, although the soil organic matter (SOM) contents did not change significantly. Compared to Zn 2+ additions, the additions of NPs significantly induced the production of root metabolites such as carboxylic acids and amino acids and also stimulated the growth of microbes involved in the degradations of plant-derived and recalcitrant SOM, such as bacteria genera RB41 and Bryobacter, and fungi genus Conocybe. The bacterial co-occurrence networks indicated that microbes associated with SOM formation and decomposition were significantly increased under NP treatments. The adsorption of NPs by roots, the generation of root metabolites (e.g., carboxylic acid and amino acid), and enrichment of key taxa (e.g., RB41 and Gaiella) were the major mechanisms by which ZnO NPs and s-ZnO NPs drove DOC release and SOM decomposition in the rhizosphere. These results provide new perspectives on the effect of ZnO NPs on agroecosystem functions in soil−plant systems.

show abstract

Section: Analysis Of Zn Content and Soil Chemical Propertiescontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 91%

Section: Analysis Of Zn Content and Soil Chemical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Pristine and Sulfidized Zinc Oxide Nanoparticles Promote the Release and Decomposition of Organic Carbon in the Legume Rhizosphere

Liu,

Tsyusko,

Unrine

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Here, the energy required for microbial metabolism may be a key driver of native SOM decomposition in the PE-treated system, which showed significantly decreased SOM content compared with the PHE-PE (p < 0.05) (Table 1). SOM decomposition can be regulated by competition among bacterial populations [34]. The effects of MPs on SOM decomposition may be controlled by the balance between microbial anabolism and catabolism [32].…”

Section: Effects Of Phe and Pe On Soil Chemical Propertiesmentioning

confidence: 99%

Effects of Polyethylene Microplastics and Phenanthrene on Soil Properties, Enzyme Activities and Bacterial Communities

Huang

Yuan

et al. 2022

Processes

View full text Add to dashboard Cite

Microplastics (MPs) or polycyclic aromatic hydrocarbons (PAHs) pollution has received increasing concern due to their ubiquitous distribution and potential risks in soils. However, nothing is known about the influences of PAHs-MPs combined pollution on soil ecosystems. To address the knowledge gap, a 1-year soil microcosm experiment was conducted to systematically investigate the single and combined effect of polyethylene (PE) /phenanthrene (PHE) on soil chemical properties, enzymatic activities and bacterial communities (i.e., diversity, composition and function). Results showed that PE and PHE-PE significantly decreased soil pH. The available phosphorus (AP) and neutral phosphatase activity were not considerably changed by PHE, PE and PHE-PE. Significant enhancement of dehydrogenase activity in a PHE-PE amended system might be due to the degradation of PHE by indigenous bacteria (i.e., Sphingomonas, Sphingobium), and PE could enhance this stimulative effect. PHE and PHE-PE led to a slight increase in soil organic matter (SOM) and fluorescein diacetate hydrolase (FDAse) activity but a decrease in available nitrogen (AN) and urease activity. PE significantly enhanced the functions of nitrogen cycle and metabolism, reducing SOM/AN contents but increasing urease/FDAse activities. There were insignificant impacts on overall community diversity and composition in treated samples, although some bacterial genera were significantly stimulated or attenuated with treatments. In conclusion, the addition of PHE and PE influenced the soil chemical properties, enzymatic activities and bacterial community diversity/composition to some extent. The significantly positive effect of PE on the nitrogen cycle and on metabolic function might lead to the conspicuous alterations in SOM/AN contents and urease/FDAse activities. This study may provide new basic information for understanding the ecological risk of PAHs-MPs combined pollution in soils.

show abstract

Buzy-pop: Multi-objective budget optimisation for constitutive and adaptive enzymatic activities of microbe populations

Breugnot,

Marilleau,

Bernard

2024

Ecological Modelling

View full text Add to dashboard Cite

Competition within low-density bacterial populations as an unexpected factor regulating carbon decomposition in bulk soil

Cited by 5 publications

References 75 publications

Pristine and Sulfidized Zinc Oxide Nanoparticles Promote the Release and Decomposition of Organic Carbon in the Legume Rhizosphere

Pristine and Sulfidized Zinc Oxide Nanoparticles Promote the Release and Decomposition of Organic Carbon in the Legume Rhizosphere

Effects of Polyethylene Microplastics and Phenanthrene on Soil Properties, Enzyme Activities and Bacterial Communities

Buzy-pop: Multi-objective budget optimisation for constitutive and adaptive enzymatic activities of microbe populations

Contact Info

Product

Resources

About